A New Modified Rainville Method in The Bone-Conduction Measurment

I. A Study on The Basic Experiments

Abstract

A new modified measurment in the bone-conduction test using bone conductive noise which had been originated by Rainviile in 1955 was devised. The differences between the original method and the new one are follows:
1. Critical narrow band noise is used instead of original white noise.
2. For hearing of air conductive tones, an insert earphone is used instead of a supraaural earphone in the original method.
3. The level of air conductive tone which is interrupted by the bone conductive noise is a higher threshold level than threshold level in the original.
Because of the modification above, the new method was found to make bone-conduction test simpler than original one. For using this new modified method as an ordinary clinical test, three basic experiments were carried out and some points were found to be investigated.